objective-c - SKView不显示？

Question

编译器没有给出任何错误，但出现的屏幕有些空，即使下面这行代码也不会影响它:

self.backgroundColor = [SKColor colorWithRed:0.0 green:0.0 blue:0.5 alpha:0.0];

我尝试将我的代码与 View Controller 和场景文件的其他模板代码进行比较，但没有成功找到问题所在。我使用的是 Xcode 6。以下是代码:1) 场景文件

#import "GameScene.h"
#import "Ball.h"
#import "WorldGenerator.h"

// 1
@interface GameScene ()
@property BOOL isStarted;
@end

@implementation GameScene
{
    Ball *ball;
    SKNode *world;
    WorldGenerator *generator;
}

-(id)initWithSize:(CGSize)size {
    if (self = [super initWithSize:size]) {
        //setup your scene here
        self.anchorPoint = CGPointMake(0.5, 0.5);
        self.backgroundColor = [SKColor colorWithRed:0.0 green:0.0 blue:0.5 alpha:0.0];

        //World
        world = [SKNode node];
        [self addChild:world];

    generator = [WorldGenerator generatorWithWorld:world];
    [self addChild:generator];
    [generator populate];

    // Ball allocation
    ball = [Ball ball];
    [self addChild:ball];

    }
    return self;
}

2)查看 Controller 文件

#import "GameViewController.h"
#import "GameScene.h"


@implementation GameViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Configure the view.
    SKView * skView = (SKView *)self.view;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

    // Create and configure the scene.
    SKScene * scene = [SKScene sceneWithSize:skView.bounds.size];
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene.
    [skView presentScene:scene];

}


- (BOOL)shouldAutorotate{
return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    } else {
        return UIInterfaceOrientationMaskAll;
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

- (BOOL)prefersStatusBarHidden {
    return YES;
}

@end

Answer 1

我认为这条线可能是问题所在。

SKScene * scene = [SKScene sceneWithSize:skView.bounds.size];

应该是

GameScene * scene = [GameScene sceneWithSize:skView.bounds.size];

您没有创建 GameScene 实例，而只是创建一个空的 SKScene。

希望对您有所帮助。